Disodium terephthalate → Calcium terephthalate

HRID 35507

Reaction equation

HRID 35507 reaction equation
[Cl-].[Ca+2:2].[Cl-].[C:4]([O-:15])(=[O:14])[C:5]1[CH:13]=[CH:12][C:8]([C:9]([O-:11])=[O:10])=[CH:7][CH:6]=1.[Na+].[Na+]>>[C:4]([O-:15])(=[O:14])[C:5]1[CH:13]=[CH:12][C:8]([C:9]([O-:11])=[O:10])=[CH:7][CH:6]=1.[Ca+2:2]

Participants

3

Reactant 2

HCID 82305Disodium terephthalateHCID 5284359Calcium Chloride

Product 1

HCID 167516Calcium terephthalate

Conditions

Temperature
200 °C

Procedure

Separately, 3.0 l of an aqueous 10% (v/v) calcium chloride solution was placed into a 20 l reactor equipped with a stirrer and 11.3 l of an aqueous 5% (w/v) sodium terephthalate solution was added with stirring. The precipitated calcium terephthalate trihydrate was collected by solid-liquid separation and heated for 2 hours at 200° C. to convert into the anhydrous salt. The resulting particles were plates of 2 to 4μ in thickness and 10 to 30μ in maximum diameter. A portion of the calcium terephthalate was ground on a ball mill for 1 hour, dispersed in ethylene glycol to form a 10% (w/v) slurry and classified through a centrifugal classifier of Kokusan type to obtain bulk anhydrous calcium terephthalate having an average diameter of 2.0μ.

Workup

  1. customequipped with a stirrer
  2. customThe precipitated calcium terephthalate trihydrate was collected by solid-liquid separation
  3. customfor 1 hour
  4. additiondispersed in ethylene glycol
  5. customto form a 10% (w/v) slurry

Sources & evidence

ORD record
ord-10d4095b1f6d4d079cfa03fcc84d977b
Source dataset
uspto-grants-1988_08
Patent number
US04767657

Linked notes

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